Spark-coil.



FATENTED JAN. 28, 1908.

@DIL

APPLICATION FILED omas. 1906. Hmmm JUNE 22,190?.

SPARE 'narran srnras "earner onirica AUGUST a'. toscani, or omo-ico; iLLINoIs, Assioma To MOTOR SPECIALTY MAN- No. src/,ese

Specification of Letters Patent.

oHIoaoo,1LLrNOis, A ooRroaATioN oF SOUTH l SPARK-CEL.'

Patented Jan. as, 1 eos.V

pplication tiled October 29. 19.06. Serial No. 341.005. Renewed June 22. 1907, Serial No. 380.241.

To all Iiff/10m 'it muy concern.'

Bc it known that l, Ar'ms'r R. .lasci-rim, :i citizen of Switzerland, and a resident of ('hic'ago, in the county of Cool( and State of illinois, have invented certain new and useful .im izoyenients in Spark-Coils, of which the following-is a speciiication.

T his invention relates to inductive coils, and more especially to that type of such coils known ignition spark coils, and has for' its object to provide 'a simple and ellicient structural arrangementof the coil parts whereby leakage between the secondary winding of the coil and the condenser is prevent-ed in a very effective manner, with a corresponding increase in the effectiveness of the apparatus, and in the dura-bility of the component parts thereof, all as will hereinafter more fully appear.

in the accompanying drawings z-Figure 1, is a'diagram View of anignitiou spark coil syste1n,'to which the present invention is more. especially applicable. Fig. 2, is a longitudinal sectionof an 'ignition spark coil, constructed in accordance with the present invention. Figs. 3, 4 and 5, ara-transverse sections of the same, on line -'zc Fig.A 2,

illustrating various modified arrangements of the condenser with relation to the inductive coils. i i

Similar numerals of reference indicate like parts in the several views.

Recerring to the drawings, 1 represents the soft iron core,si1rrounded by the primary coil or winding?, of comparatively heavy wire and few turns.

3, is the secondary ooil or winding, of line wire and many turns, surrounding the primary coil 2, and insulated therefrom by the usual sleeve Il, of` insulating material. Usually such secondary coil 3, will be Wound in two sections connected together in series as l shown in Fie. 2. v g

fi, is the inclosing casing of any suitable insulating material, and rin and upon which the coil parts and accessories are mounted as usual in'thc present class of apparatus,

(j, is the vibratory ,circuit interruptor, having an adjustablescrew or contact 7, carried by a bracket piece 8 attached inv an insulated manner to thecasing 5, and provided with a binding post l), which is in connection with a timer 1() adapted to open and close ,tliocircuit at the proper times.

11, is binding post connected through connected in shunt with the circuit of thel automatic interrupter 6, and asy so' oonstructed and arranged the end of the secondary 'coil or winding next to the interrupter will be the ground side of such coil, while the other end will be the high tension side of said coil.

The construction and arrangement of parts so far described, common to ignition spark coils in general use, and is intended to illustrate an application of the'present improvement to spark coils equipped with vibratory interrupters; the present improvement ishowever applicable to any other type of spark coils where the arrangement 'and location of the condenser remains the same, as for instance the ordinary type of coil without an interrupter, often used.

As usually arranged the condenser 14, extends the entire lengthof the coil, and I have found that regardless of the insulating partition l5, or other equivalent insulating means, there is a considerable discharge of high Voltage electricity from the high tension side or section of the secondary coil or winding 3, to the condenser, along the entire length ot' such section of the secondary coil, and which discharge materially reduces the quantity of current obtained at the terminal 13 of the apparatus. Such discharge, while in the nature of a silent discharge, has the tendency to destroy the insulating materials used in course of time, and which once broken through renders the coilabsolutely useless.

With the purpose of reniedyig the defects above pointed out, the" present improvement consists in the construction of the condenser la-ot' a length approximating that of thelow tension section of the secondary coil orqvinding 3, and the arrangement'. of the condenser so-tormed in an adjacent relation to said section of the second ary coil, as illustinted in Fig. 2. By suoli foination andY allongement, the preservation of tlie insulating partition l is attained in a ieiy perfeet manner, while the appmat'us is rendeed 5 -Imicli morepowerful :ind oetein; due to en entire elimination of intenal leakage.

ln the pi'actica-l application of tlie piesent invention, the condensvei` lli may be of the flat form shown in Figi'.l 3 .and erenged 1oe- 'heath the secondary coil or Winding 3; or the said condenserinay be mede of en angulo? form to partially encircle the vSeeondary ooil oi' winding, as illustrnted in Eig, 4; oi said condenser may lic of an annular form and gadaptedto lfully or partially encircle seid secondaiy coil or winding es illustated in .Figa 5, and as the particular requirements or the judgment of the oonstiuctor may dictate. l' l Having thus fully descibed my Said invention what l claim as new `and desire to secure by Letters Patent, isz i '1. In a spark coil of the type desoiloed, the combination of a secondary Coil oi winding, and a condenser eimngefl at tlie low tension or grounded end of seid scoondoy, coil. 2. ln a spalk coil of the type desciibed,` the combination of e secondary coil foin'ied with high end low tension sections, e condenser arranged adjacent to tlielow ten: sion section of said secondey coil.

3. In a spark coil the type desoibed,

the oomloinetiono a. seconda-YV coil'o Winding having e low tension end fonied by a gifound connection through the botteiy, end e oonde'nsei flanged at'nseid low ten lon end.

4. In a speil coil ofl the type described, tlie combination of @Secondary coil oi' Winding, and e condens-ef oi en annuler shape enicircling coil and arranged at the low tension end theeo'i.

ln e spark coil of the type descsibed, tlie"comloinetion of e seconden@T coil formed' with high and low` tension sectionsJ and a condensef or" en annule? shape encircling the low'tension section oi the secondary coil.

in e epeli coil of the type described, the combination of a. secondary coil or winding lia-ving e low tension end formed. by e ground connection thiougn the battery, sind a condenser of" en'a-nnule Slmpe enciioling said soil and arranged at tlie lov: tension end. tliefeo.

'7. lne spark coil ofthe type descilid 'the combination of seconde'fy coil w in e plufeiity of sections sind o condense zenged odgeoeiit to the gioundeil side oAVL secondary coil.

Signed et Gliicego, illinois, tliis 25th ieg otbei i905.

'ill/Ti tnesses HARLES G. Bini), ROBERT BURNS.' 

